Question: When a diffraction grating having 5 0 0 0 lines / cm is illuminated by monochromatic light, the angle between the central maximum and the

When a diffraction grating having 5000 lines/cm is illuminated by monochromatic light, the angle between the central maximum and the fourth order maximum is 47.2. What is the wavelength of the light?
A)238 nm
B)583 nm
C)367 nm
D)637 nm
E)456 nm

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